Pump



Nov. 2o, 192; l 1,692,639

` H. 1 ELSNER PUMP Filed Dec. l1. 1926 3 Sheets-Sheet 1 A TTORNE Y.

Nov`. 20, 1.928.. 1,692,639

- H. L. ELSNER PUMP Filed nec. 11. 1926 s sheets-sheet 2 @"3 INVENTOR.

A TTORNE Y.

PATENT oiFicE.

i HENRY L. ELSNEB, 0F DETROIT, MICHIGAN.

PUMP.

Application ledileoember 11, 1926y Serial No. 154,078.

This invention relates to pumps and the object of the invention is to provide a pump for pumping a liquid in which the flow of liquid from the pum is continuous.

Another ob]ect of the invention 1s to provide a pump which will continue to pump even when considerable sand or grit or other foreign matter is carried into the pump with the liquid.

A further object of the invention is Ato provide a pump in which thelosses by friction are minimized and in which the pump ,may be set to discontinue pumping the liquid upon attainment of the desired pressure.

Another object of the inventionis to provide a pump in which pumping units may be added together to increase 'the volume of liquid being pumped.

These ob]ects and the several novel features of the invention are hereinafter more fully described and claimed and the preferred form of construction by which these objects are attained is shown in the accompanying drawin in whichg ig. 1 is a plan view of the pump with one A of the side plates removed.

Fig. 2 is an edge view of the pump. Fig. 3 is a section taken on line 3-3 of Fig. 4 is a plan view of the assembled pump.

Fig. 5 is a view similar to Fig. 1 showing an alternative arrangement.

Fig. 6 is an enlarged section taken on line 6-6 of Fig. 5.

As is shown in Fi 1, 2 and 3 the pump comprises an annular ody member l to which the side plates 2 and 3 are secured by the bolts 4. The annular body member 1 is provided with an extension 5 at the upper end having an intake conduit 6 and a discharge conduit 7 opening therethrough. A manifold 8 is secured over the intake conduit 6 and the liquid entering the pump is adapted to pass through the intake manifold 8 and through the intake conduit 6. The discharge manifoldv 9 is secured over the discharge conduit 7 through which the liquid is adapted to dischar e from the pump. The annular bod mem er v1 is provided with a cylindrica chamber 10 therein and a ring 11 is mounted Within the chamber 10 and is provided with annular grooves 12 in the sides thereof which are adapted to fill with liquid during the pumpin operation and provide a seal between t e edge of the ring 11 and the side plates 2 and 3 of thepump. As shown in Figs. 1 and 3 a shaft 13 extends through the side plates 2 and 3 ofthe pump and through the center of the chamber 10 and the side plates 2 and 3 are each provided with packing nuts 14 to prevent leakage longitudinally of the shaft 13. If desired roller or ball bearings may be provided for the shaft 13 in order to reduce frictional losses. The portion 15 of the shaft extending-through the chamber 10 is squared as shown in Figs. 1 and 3 and a ,member 16 is provided with a square aperture fitting over the square portion 15 of the shaft. This member 16 as shown more particularly in Fig. 1, is provided with two arms 17 and 18 having bifurcated ends between which the rollers 19a and 20 are rotatably mounted. The rollers 19 and 2O are each provided with a ball race in which a series of bearing balls are mounted and a ring 21 is provided for each roller 19 and 20 having a race fitting over the bearing balls. These rings 21 are adapted to ride in contact with the inner peripheral face of the ring 11 as will be understood from Figs. 1 and 3. As shown in Fig. 3 the member 16 is also provided with an extension 22 at one side having a recess 23 in which a coiled spring 24 is mounted. A member 25 extends into the recess 23 and is provided with a bifurcated end 26 in which a roller 27 is rotatabl mounted on the pin 28. A ring 29 is provi ed about the roller 27 and the roller and ring are each rovided with ball races between which the caring balls 30 are mounted. The spring 24 tends to ,move the member 25 outwardlyl and thus holds the roller 27 in engagement with the inner face of the ring 11. The portion 5 of the member 1 is provided lwith a slot or recess 31 in which a. tongue 32 is slidable longitudinally and this tongue 32 at the upper end as shown in Fig. 3 is provided with two recesses 33 in which the two springs 34 are mounted, the upper ends of the springs being adapted to engage in the upper end of the recess 31. These springs tends to move the tongue 32 toward the center of the pump and hold the end of the tongue 32 in engagement with the ring 11.

As shown in Fig. 1 two chambers 35 and 36 are provided on opposite sides of the tongue 32. The chamber 35 is adapted to be filled with liquid from the intake conduit 6 and the chamber 36 is filled with liquid adapted to be discharged through the discharge conduit 7. The shaft 13, shown in Fig. 1, is adaptedto be rotated in a counter-clockwise direction and the spring pressed roller 27 moves the ring iop 11 into contact with the cylindrical wall 1 of the pump. As the counter-clockwise rotation of the shaft 13 is continued from the position shown in Fig. 1 the rollers 19, 20 and 27 are moved in a counter-clockwise direction with the shaft 13 and this movement ofthe roller 27 causes the contact point between the ring 11 and wall 1 ofthe pump to move upwardly toward the discharge conduit 7 thus decreasing the size of the chamber 36 and raising the tongue 32 against the tension of the springs 34. This decrease in the size of the Chamb through the discharge conduit 7 and discharge manifold 9 and at the same time this movement of the ring 11 increases the size of the chamber 35 thus drawing additional liquid through the intake conduit 6 into the chamber 35. By rotation of the roller 27 the contact point of the ring 11 moves in a counter-clockwise direction about the inner peripheral face of the casing 1. This movement of the ring 11 produces the pumping action. The size of the chamber 35 increases constantl until the ring 11 closes the openings ofthe intake and discharge conduits 6 and 7. At this time the chambers 35 and 36 are merged together on the side of the ring 11 opposite the intake and discharge conduits.

As the contact point of the ring 11 with the wall 1 passes the intake opening in the wall 1 the entire liquid in the merged chambers 35 and 36 is put under pressure which discharges the liquid throu h the discharge conduit 7 during travel of t e ring 11 and this discharge continues until the contact point of the ring 11 with the Wall 1 again reaches the opening of the dischar e conduit 7. Also as the contact point of t e ring 11 passes the opening of the intake conduit 6 the size of the chamber 35 is constantly increasing so that the ump intakes liquid while it is discharging lpjquid. By this arrangement an almost constant stream of liquid is passed through the discharge conduit 7. As the rollers 19, 20 and 27 are freely rotatable the ring 11 is not necessarily rotated, so that there is no appreciable Wear between the end of the tongue 32 and the surface of the ring 11 nor between the ring 11 and Wall 1 of the pump. If foreign matter should enter the pump through the intake 6 the ring 11 would tend to drive the forei n matter against the wall 1 of the pump an the ring 11 will ride over the foreign matter which would force the member 25 shown in Fig. 3 into the recess 23 against the tension of the spring 24. Also should a high back pressure develop in the discharge conduit 7 this pressure will be communicated through the llquid in the chamber 36 thus forcing the ring 11 away from its point of contact with the wall 1 and compressing the s ring 24 which allows the pressure to artially relieve through the chamber 35 an intake conduit 6. It will thus be seen by utilizer 36 forces the liquid to discharge ing springs 24 of different pressures the pump may pump up to a pressure at which the spring 24 Vwill be compressed sufficiently to allow the ring 11 to move away from the wall 1 which would allow the pressure to relieve back through the chamber 35 until the plessure is decreased suiciently to allow the spring 24 to again force the ring 11 back into contact with the wall. By this arrangement the pump may be made to pump up to a certain pressure and maintain that pressure in the discharge conduit 7 until the pressure in the discharge conduit 7 is relieved by means of a valve or in some other manner. If dcsired the shaft 13 may be rotated in a clockwise direction in which case the conduit 7 would become the intake conduit and the conduit 6 would become the discharge conduit. If desired several of these pumpsmay be secured together on the same shaft to increase the volume being pumped upon each rotation of the shaft.

An alternative form of construction is shown in Figs. 5 and 6 in which two blocks 37 and 38 may be bolted about the square portion 15 of the shaft by the two bolts 39, and a round cam 40 is provided with a recess 41 longer than the blocks 37 and 38. By this arrangement the cam 40 may be moved longitudmally of the blocks and a spring 42 is provided yieldably holding the cam extending eccentrically to the shaft 15 as shown in Fig. 5. A ring 43 is provided about the cam 40 and is provided with ball bearings so that the ring is freely rotatable about the cam 40. The pumping operation of this form is the same as that shown in Fig. 1 and the spring 42 performs the same function as the spring 24 shown in Fig. .3 so that the ring 43 may pass over forelgn matter drawn into the pump and upon excessive ressure developing in the discharge conduit 7) the spring 42 will be compressed to move the ring 43 .and cam 40 away from the cylindrical wall of the chamber and allow t-he pressure to partially 11o relieve through the chamber 35 and intake conduit 6. v

From the foregoing description it becomes evident that the devlce is very simple and efiicient in operation, will not easily get out- 115 of order, is composed of few parts and is of consequent low manufacturing cost and urovides a device which accomplishes the obJects described.

Havin thus fully described my invention, 12o what I c aim is-` 1. A pum comprising a casing having a c lindrical c amber therein,ashaft extending t rough the center of the chamber and rotatably mounted in the casing, a member secured 125 to the shaft within the chamber and supporting three rollers, one of the said rollers being movable toward or away from the shaft,

a ring smaller in diameter than the chamber and positioned about the three rollers, yieldable means tending to move the movable roller outwardl to move the rino' into Contact with the wall ofthe cylindrica chamber, the ring being equal in width to the depth of the chamber, a tongue extending from the wall of the chamber and yieldable means forcing the tongue into contact with the outer peripheral face of the ring, the casing being pro vided with an intake conduit opening into the chamber on one side of the tongue and a discharge conduit opening into the chamber on the opposite side of the tongue.

2. A pump comprising acasing having a cylindrical chamber therein a shaft extending through the center of the casing, a member secured to the shaft withinthe chamber and having three arms, a rollerv rotatably mounted in the end of each arm, one of the said arms being adapted to telescope, a spring normally holding the said arm in the extended osition, a ring mounted about the three ro 1ers within the chamber, the spring pressed roller holding the ring in contact with the cylindrical wall of the casing, the pumpbeing provided with an 'intal ana a means tending to extend the movable roller to' force the ring into contact with the Wall of the cylindrical chamber, a tongue extending from the wall of t-he casing into contact with the ring, an intake conduit on one side of the tongue and a discharge conduit on the opposite side of the tongue.

In testimony whereof I sign this specification.

HENRY L. ELSNER. 

